gcc/libgcc2.h

   1 /* Header file for libgcc2.c.  */
   2 /* Copyright (C) 2000, 2001, 2004
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29
  30 #ifndef GCC_LIBGCC2_H
  31 #define GCC_LIBGCC2_H
  32
  33 #ifndef HIDE_EXPORTS
  34 #pragma GCC visibility push(default)
  35 #endif
  36
  37 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  38 extern void __clear_cache (char *, char *);
  39 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  40   __attribute__ ((__noreturn__));
  41
  42 struct exception_descriptor;
  43 extern short int __get_eh_table_language (struct exception_descriptor *);
  44 extern short int __get_eh_table_version (struct exception_descriptor *);
  45
  46 /* Permit the tm.h file to select the endianness to use just for this
  47    file.  This is used when the endianness is determined when the
  48    compiler is run.  */
  49
  50 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  51 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  52 #endif
  53
  54 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  55 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  56 #endif
  57
  58 #ifndef MIN_UNITS_PER_WORD
  59 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  60 #endif
  61
  62 /* In the first part of this file, we are interfacing to calls generated
  63    by the compiler itself.  These calls pass values into these routines
  64    which have very specific modes (rather than very specific types), and
  65    these compiler-generated calls also expect any return values to have
  66    very specific modes (rather than very specific types).  Thus, we need
  67    to avoid using regular C language type names in this part of the file
  68    because the sizes for those types can be configured to be anything.
  69    Instead we use the following special type names.  */
  70
  71 typedef          int QItype     __attribute__ ((mode (QI)));
  72 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  73 typedef          int HItype     __attribute__ ((mode (HI)));
  74 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  75 #if MIN_UNITS_PER_WORD > 1
  76 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
  77 typedef          int SItype     __attribute__ ((mode (SI)));
  78 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  79 #if LONG_LONG_TYPE_SIZE > 32
  80 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
  81 typedef          int DItype     __attribute__ ((mode (DI)));
  82 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  83 #if MIN_UNITS_PER_WORD > 4
  84 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
  85 typedef          int TItype     __attribute__ ((mode (TI)));
  86 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  87 #endif
  88 #endif
  89 #endif
  90
  91 #if BITS_PER_UNIT == 8
  92
  93 typedef         float SFtype    __attribute__ ((mode (SF)));
  94 typedef         float DFtype    __attribute__ ((mode (DF)));
  95
  96 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80
  97 typedef         float XFtype    __attribute__ ((mode (XF)));
  98 #endif
  99 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 100 typedef         float TFtype    __attribute__ ((mode (TF)));
 101 #endif
 102
 103 #else /* BITS_PER_UNIT != 8 */
 104
 105 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 106    For now we don't support them in libgcc2.c.  */
 107
 108 #undef L_fixdfdi
 109 #undef L_fixsfdi
 110 #undef L_fixtfdi
 111 #undef L_fixunsdfdi
 112 #undef L_fixunsdfsi
 113 #undef L_fixunssfdi
 114 #undef L_fixunssfsi
 115 #undef L_fixunstfdi
 116 #undef L_fixunsxfdi
 117 #undef L_fixunsxfsi
 118 #undef L_fixxfdi
 119 #undef L_floatdidf
 120 #undef L_floatdisf
 121 #undef L_floatditf
 122 #undef L_floatdixf
 123
 124 #endif /* BITS_PER_UNIT != 8 */
 125
 126 typedef int word_type __attribute__ ((mode (__word__)));
 127
 128 /* Make sure that we don't accidentally use any normal C language built-in
 129    type names in the first part of this file.  Instead we want to use *only*
 130    the type names defined above.  The following macro definitions insure
 131    that if we *do* accidentally use some normal C language built-in type name,
 132    we will get a syntax error.  */
 133
 134 #define char bogus_type
 135 #define short bogus_type
 136 #define int bogus_type
 137 #define long bogus_type
 138 #define unsigned bogus_type
 139 #define float bogus_type
 140 #define double bogus_type
 141
 142 /* Versions prior to 3.4.4 were not taking into account the word size for
 143    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 144    a consequence, the si and di variants were always and the only ones emitted.
 145    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 146    defined on platforms where it makes sense to still have the si variants
 147    emitted.  As a bonus, their implementation is now correct.  Note that the
 148    same mechanism should have been implemented for the di variants, but it
 149    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 150    if it existed.  */
 151
 152 #if MIN_UNITS_PER_WORD > 4
 153 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 154 #define Wtype   DItype
 155 #define UWtype  UDItype
 156 #define HWtype  DItype
 157 #define UHWtype UDItype
 158 #define DWtype  TItype
 159 #define UDWtype UTItype
 160 #define __NW(a,b)       __ ## a ## di ## b
 161 #define __NDW(a,b)      __ ## a ## ti ## b
 162 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 163 #elif MIN_UNITS_PER_WORD > 2 \
 164       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 165 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 166 #define Wtype   SItype
 167 #define UWtype  USItype
 168 #define HWtype  SItype
 169 #define UHWtype USItype
 170 #define DWtype  DItype
 171 #define UDWtype UDItype
 172 #define __NW(a,b)       __ ## a ## si ## b
 173 #define __NDW(a,b)      __ ## a ## di ## b
 174 #elif MIN_UNITS_PER_WORD > 1
 175 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 176 #define Wtype   HItype
 177 #define UWtype  UHItype
 178 #define HWtype  HItype
 179 #define UHWtype UHItype
 180 #define DWtype  SItype
 181 #define UDWtype USItype
 182 #define __NW(a,b)       __ ## a ## hi ## b
 183 #define __NDW(a,b)      __ ## a ## si ## b
 184 #else
 185 #define W_TYPE_SIZE BITS_PER_UNIT
 186 #define Wtype   QItype
 187 #define UWtype  UQItype
 188 #define HWtype  QItype
 189 #define UHWtype UQItype
 190 #define DWtype  HItype
 191 #define UDWtype UHItype
 192 #define __NW(a,b)       __ ## a ## qi ## b
 193 #define __NDW(a,b)      __ ## a ## hi ## b
 194 #endif
 195
 196 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 197 #define Wtype_MIN (- Wtype_MAX - 1)
 198
 199 #define __muldi3        __NDW(mul,3)
 200 #define __divdi3        __NDW(div,3)
 201 #define __udivdi3       __NDW(udiv,3)
 202 #define __moddi3        __NDW(mod,3)
 203 #define __umoddi3       __NDW(umod,3)
 204 #define __negdi2        __NDW(neg,2)
 205 #define __lshrdi3       __NDW(lshr,3)
 206 #define __ashldi3       __NDW(ashl,3)
 207 #define __ashrdi3       __NDW(ashr,3)
 208 #define __cmpdi2        __NDW(cmp,2)
 209 #define __ucmpdi2       __NDW(ucmp,2)
 210 #define __udivmoddi4    __NDW(udivmod,4)
 211 #define __fixunstfDI    __NDW(fixunstf,)
 212 #define __fixtfdi       __NDW(fixtf,)
 213 #define __fixunsxfDI    __NDW(fixunsxf,)
 214 #define __fixxfdi       __NDW(fixxf,)
 215 #define __fixunsdfDI    __NDW(fixunsdf,)
 216 #define __fixdfdi       __NDW(fixdf,)
 217 #define __fixunssfDI    __NDW(fixunssf,)
 218 #define __fixsfdi       __NDW(fixsf,)
 219 #define __floatdixf     __NDW(float,xf)
 220 #define __floatditf     __NDW(float,tf)
 221 #define __floatdidf     __NDW(float,df)
 222 #define __floatdisf     __NDW(float,sf)
 223 #define __fixunsxfSI    __NW(fixunsxf,)
 224 #define __fixunstfSI    __NW(fixunstf,)
 225 #define __fixunsdfSI    __NW(fixunsdf,)
 226 #define __fixunssfSI    __NW(fixunssf,)
 227
 228 #define __absvSI2       __NW(absv,2)
 229 #define __addvSI3       __NW(addv,3)
 230 #define __subvSI3       __NW(subv,3)
 231 #define __mulvSI3       __NW(mulv,3)
 232 #define __negvSI2       __NW(negv,2)
 233 #define __absvDI2       __NDW(absv,2)
 234 #define __addvDI3       __NDW(addv,3)
 235 #define __subvDI3       __NDW(subv,3)
 236 #define __mulvDI3       __NDW(mulv,3)
 237 #define __negvDI2       __NDW(negv,2)
 238
 239 #define __ffsSI2        __NW(ffs,2)
 240 #define __clzSI2        __NW(clz,2)
 241 #define __ctzSI2        __NW(ctz,2)
 242 #define __popcountSI2   __NW(popcount,2)
 243 #define __paritySI2     __NW(parity,2)
 244 #define __ffsDI2        __NDW(ffs,2)
 245 #define __clzDI2        __NDW(clz,2)
 246 #define __ctzDI2        __NDW(ctz,2)
 247 #define __popcountDI2   __NDW(popcount,2)
 248 #define __parityDI2     __NDW(parity,2)
 249
 250 extern DWtype __muldi3 (DWtype, DWtype);
 251 extern DWtype __divdi3 (DWtype, DWtype);
 252 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 253 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 254 extern DWtype __moddi3 (DWtype, DWtype);
 255
 256 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 257 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 258      !defined (L_umoddi3) && !defined (L_moddi3))
 259 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 260 #endif
 261
 262 /* __negdi2 is static inline when building other libgcc2 portions.  */
 263 #if !defined(L_divdi3) && !defined(L_moddi3)
 264 extern DWtype __negdi2 (DWtype);
 265 #endif
 266
 267 extern DWtype __lshrdi3 (DWtype, word_type);
 268 extern DWtype __ashldi3 (DWtype, word_type);
 269 extern DWtype __ashrdi3 (DWtype, word_type);
 270
 271 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 272 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 273      !defined(L_umoddi3) && !defined(L_moddi3))
 274 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 275 #endif
 276
 277 extern word_type __cmpdi2 (DWtype, DWtype);
 278 extern word_type __ucmpdi2 (DWtype, DWtype);
 279
 280 extern Wtype __absvSI2 (Wtype);
 281 extern Wtype __addvSI3 (Wtype, Wtype);
 282 extern Wtype __subvSI3 (Wtype, Wtype);
 283 extern Wtype __mulvSI3 (Wtype, Wtype);
 284 extern Wtype __negvSI2 (Wtype);
 285 extern DWtype __absvDI2 (DWtype);
 286 extern DWtype __addvDI3 (DWtype, DWtype);
 287 extern DWtype __subvDI3 (DWtype, DWtype);
 288 extern DWtype __mulvDI3 (DWtype, DWtype);
 289 extern DWtype __negvDI2 (DWtype);
 290
 291 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 292 extern SItype __absvsi2 (SItype);
 293 extern SItype __addvsi3 (SItype, SItype);
 294 extern SItype __subvsi3 (SItype, SItype);
 295 extern SItype __mulvsi3 (SItype, SItype);
 296 extern SItype __negvsi2 (SItype);
 297 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 298
 299 #if BITS_PER_UNIT == 8
 300 extern DWtype __fixdfdi (DFtype);
 301 extern DWtype __fixsfdi (SFtype);
 302 extern DFtype __floatdidf (DWtype);
 303 extern SFtype __floatdisf (DWtype);
 304 extern UWtype __fixunsdfSI (DFtype);
 305 extern UWtype __fixunssfSI (SFtype);
 306 extern DWtype __fixunsdfDI (DFtype);
 307 extern DWtype __fixunssfDI (SFtype);
 308
 309 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80
 310 extern DWtype __fixxfdi (XFtype);
 311 extern DWtype __fixunsxfDI (XFtype);
 312 extern XFtype __floatdixf (DWtype);
 313 extern UWtype __fixunsxfSI (XFtype);
 314 #endif
 315
 316 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 317 extern DWtype __fixunstfDI (TFtype);
 318 extern DWtype __fixtfdi (TFtype);
 319 extern TFtype __floatditf (DWtype);
 320 #endif
 321 #endif /* BITS_PER_UNIT == 8 */
 322
 323 /* DWstructs are pairs of Wtype values in the order determined by
 324    LIBGCC2_WORDS_BIG_ENDIAN.  */
 325
 326 #if LIBGCC2_WORDS_BIG_ENDIAN
 327   struct DWstruct {Wtype high, low;};
 328 #else
 329   struct DWstruct {Wtype low, high;};
 330 #endif
 331
 332 /* We need this union to unpack/pack DImode values, since we don't have
 333    any arithmetic yet.  Incoming DImode parameters are stored into the
 334    `ll' field, and the unpacked result is read from the struct `s'.  */
 335
 336 typedef union
 337 {
 338   struct DWstruct s;
 339   DWtype ll;
 340 } DWunion;
 341
 342 #include "longlong.h"
 343
 344 #undef int
 345 extern int __clzDI2 (UDWtype);
 346 extern int __clzSI2 (UWtype);
 347 extern int __ctzSI2 (UWtype);
 348 extern int __ffsSI2 (UWtype);
 349 extern int __ffsDI2 (DWtype);
 350 extern int __ctzDI2 (UDWtype);
 351 extern int __popcountSI2 (UWtype);
 352 extern int __popcountDI2 (UDWtype);
 353 extern int __paritySI2 (UWtype);
 354 extern int __parityDI2 (UDWtype);
 355 #define int bogus_type
 356
 357 extern void __enable_execute_stack (void *);
 358
 359 #ifndef HIDE_EXPORTS
 360 #pragma GCC visibility pop
 361 #endif
 362
 363 #endif /* ! GCC_LIBGCC2_H */